Jung, Heesuk Min, Sung Yoon Kang, Byungsoo Yoo, Yongseok Jang, Jihun Jang, Yeoun-Woo Choi, Hyojeong Lee, Hyeong Won Biswas, Swarup Lee, Yongju Choi, Mansoo Lee, Phillip Jang, Min Seok Kim, Hyeok Yang, Shu 2024-11-07T00:30:13Z 2024-11-07T00:30:13Z 2024-11-06 2026-01 1616-301X https://pubs.kist.re.kr/handle/201004/150963 Continuous heat generation in perovskite solar cells (PSCs), caused by solar radiation, poses a significant challenge to their lifespan. Existing active cooling methods require extra energy input and might not be effective at high temperatures. Most reported passive radiative cooling materials either lack solar transparency or require complex fabrication processes. Here, mesoporous silica nanoparticles are designed, synthesized, and assembled into multilayered stacks with a graded refractive index (GRI) by spray coating them on top of PSCs made from methylammonium lead iodide (MAPbI3) over a large scale (15.6 × 15.6 cm2). This coating offers both high transparency in the visible wavelength and high emissivity in the mid-infrared region, leading to an average temperature reduction of 6.65 ±  1.48 °C in GRI-coated MAPbI3 PSCs under outdoor conditions compared to non-coated references. After 50 d, the GRI-coated PSCs maintain 80.9 ± 8.7% of their initial photoconversion efficiency, in contrast to 6.1 ± 5.9% for the noncoated ones. The calculated cooling power of the GRI-coated PSCs is 28.9% higher than that of the reference cells. English John Wiley & Sons Ltd. Efficient and Scalable Radiative Cooling for Photovoltaics Using Solution-Processable and Solar-Transparent Mesoporous Nanoparticles Article 10.1002/adfm.202410478 1 Advanced Functional Materials, v.36, no.6 Advanced Functional Materials 36 6 Y scie 001336349400001 2-s2.0-85206633269 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article TEMPERATURE COEFFICIENTS SPIRO-OMETAD SILICON CELLS COATINGS ENHANCE FILMS INTEGRATION HIGH-PERFORMANCE INFRARED OPTICAL-PROPERTIES graded refractive index structure mesoporous silica nanoparticles perovskite solar cells radiative cooling thermal degradation